A Priori Subcell Limiting Approach for the FR/CPR Method on Unstructured Meshes

A priori subcell limiting approach is developed for high-order flux reconstruction/correction procedure via reconstruction (FR/CPR) methods on two-dimensional unstructured quadrilateral meshes. Firstly, a modified indicator based on modal energy coefficients is proposed to detect troubled cells, where discontinuities exist. Then, troubled cells are decomposed into nonuniform subcells and each subcell has one solution point. A second-order finite difference shock-capturing scheme based on nonuniform nonlinear weighted (NNW) interpolation is constructed to perform the calculation on troubled cells while smooth cells are calculated by the CPR method. Numerical investigations show that the proposed subcell limiting strategy on unstructured quadrilateral meshes is robust in shock-capturing.     

环形电切锥切术治疗老年宫颈高度病变病人的临床疗效

目的探讨环形电切锥切术(LEEP)治疗老年宫颈高度病变病人的临床效果及对逆转率的影响。方法选择2017年6月至2019年6月老年宫颈高度病变病人143例作为对象,采用随机数表法分为对照组(n=70)和观察组(n=73)。对照组采用宫颈冷刀锥切术治疗,观察组采用LEEP治疗,术后3 d对病人手术指标进行评估,术后对病人进行6个月随访,比较2组手术指标、逆转率、并发症发生率及术后生活质量。结果观察组手术、住院及切口愈合的时间,术中出血量及手术费用均少于对照组(P<0.05)。术后6个月,2组宫颈管粘连、感染、阴道出血的发生率差异均无统计学意义(P>0.05)。2组术后1、6个月逆转率差异均无统计学意义(P>0.05)。观察组术后6个月的健康、食欲、精神症状、躯体感觉及睡眠状态评分均高于对照组(P<0.05)。结论LEEP用于老年宫颈高度病变病人中,手术创伤较小,能提高逆转率,降低术后并发症发生率,有助于提高病人生活质量,值得推广应用。     

Gastro-oesophageal reflux in children: surgical management

Gastro-oesophageal reflux disease (GORD) is symptomatic reflux of gastric contents into the oesophagus. Factors predisposing to GORD are loss of the physiological antireflux barrier and anatomic abnormalities of the oesophagus or diaphragm. Conservative measures and medical management results in resolution of symptoms in a majority of children. Surgery is indicated in the event of failure of medical management or severe complications. Surgical procedures include open or laparoscopic fundoplication in children with normal neurology; fundoplication with or without vagotomy and pyloroplasty; surgical feeding jejunostomy and oesophago-gastric dissociation in the severely neurologically impaired children.